Eevee

Eevolve (At the beginning of your upkeep, you may pay {2}. If you pay {2}, you may sacrifice this card, and you may search your library and/or graveyard for a card named Vaporeon, Jolteon, Flareon, Umbreon, Glaceon, Leafeon, Espeon, or Sylveon, and summon it to the battlefield)